chore: add css preprocessor trees

Author: jkuri

lib/broccoli/angular2-app.js

@@ -46,11 +46,76 @@ Angular2App.prototype.toTree = function () {
     buildTrees.push(tsSrcTree);
   }
 
+  var tsconfig = JSON.parse(fs.readFileSync('src/tsconfig.json', 'utf-8'));
+  // Add all spec files to files. We need this because spec files are their own entry
+  // point.
+  fs.readdirSync(sourceDir).forEach(function addPathRecursive(name) {
+    const filePath = path.join(sourceDir, name);
+    if (filePath.match(/\.spec\.[jt]s$/)) {
+      tsconfig.files.push(name);
+    } else if (fs.statSync(filePath).isDirectory()) {
+      // Recursively call this function with the full sub-path.
+      fs.readdirSync(filePath).forEach(function (n) {
+        addPathRecursive(path.join(name, n));
+      });
+    }
+  });
+
+  // Because the tsconfig does not include the source directory, add this as the first path
+  // element.
+  tsconfig.files = tsconfig.files.map(name => path.join(sourceDir, name));
+
+  var srcAndTypingsTree = mergeTrees([sourceTree, typingsTree]);
+  var tsTree = new compileWithTypescript(srcAndTypingsTree, tsconfig);
+
+  tsTree = new Funnel(tsTree, {
+    srcDir: 'src',
+    exclude: ['*.d.ts', 'tsconfig.json']
+  });
+
+  var jsTree = new Funnel(sourceDir, {
+    include: ['**/*.js'],
+    allowEmpty: true
+  });
+
+  var assetTree = new Funnel(sourceDir, {
+    include: ['**/*.*'],
+    exclude: [
+      '**/*.ts', 
+      '**/*.js', 
+      '**/*.scss', 
+      '**/*.sass', 
+      '**/*.less',
+      '**/*.styl'
+    ],
+    allowEmpty: true
+  });
+
+  var vendorNpmTree = new Funnel('node_modules', {
+    include: vendorNpmFiles,
+    destDir: 'vendor'
+  });
+
+  var allTrees = [
+    assetTree,
+    tsTree,
+    jsTree,
+    this.index(),
+    vendorNpmTree
+  ];
+
   if (fs.existsSync('public')) {
     buildTrees.push(excludeDotfilesTree);
   }
 
-  var merged = mergeTrees(buildTrees, { overwrite: true });
+  allTrees = allTrees.concat(
+    require('./angular-broccoli-sass').makeBroccoliTree(sourceDir),
+    require('./angular-broccoli-less').makeBroccoliTree(sourceDir),
+    require('./angular-broccoli-stylus').makeBroccoliTree(sourceDir),
+    require('./angular-broccoli-compass').makeBroccoliTree(sourceDir)
+  ).filter(x => !!x);
+
+  var merged = mergeTrees(allTrees, { overwrite: true });
 
   return mergeTrees([merged, new SwManifest([merged])]);
 };